Drive device

Abstract

A drive device serves for adjusting an operating element for a valve, a throttle, a blow-out preventor or the like, in particular in the field of gas and oil production, the operating element being actively connected to at least one driving motor via a drive train, and at least one transmission changing unit being arranged in the drive train for converting a revolution of the driving motor into a revolution of the operating element and/or a revolution/linear motion converter being arranged for converting the revolution of the driving motor into a linear motion of the operating element. In order to also have a very compact design in case of a high possible performance and to simultaneously permit a good thermal distribution within the drive device, so that separate cooling devices for carrying off the generated lost heat are superfluous, the drive train comprises at least one essentially disk- or wheel-shaped revolution introducing device which is actively connected with at least two drive shafts driven by separate driving motors.

The invention claimed is: 
     
       1. Drive device for adjusting an operating element in a component used in the field of gas or oil exploitation and/or production, comprising:
 driving motors; 
 a drive train actively connecting the operating element with the driving motors, the drive train comprising:
 at least two drive shafts, each drive shaft comprising two driving motors and a helical gear drive wheel arranged on the drive shaft; 
 at least one transmission changing unit for converting a revolution of the driving motors into a revolution of the operating element, wherein the at least one transmission changing unit comprises a step-down gear unit comprising a harmonic drive located between one of the driving motors and one of the helical gear drive wheels; and 
 a helical gear spur wheel connected to each helical gear drive wheel arranged on the drive shafts. 
 
 
     
     
       2. Drive device according to  claim 1 , wherein the helical gear spur wheel/helical gear drive wheel comprise gears that are self-locking. 
     
     
       3. Drive device according to  claim 1 , characterized in that a helical angle of the teeth of the helical gearing is between 40° and 85°. 
     
     
       4. Drive device according to  claim 1 , wherein at least two driving motors are assigned to each drive shaft at one end. 
     
     
       5. Drive device according to  claim 1 , wherein the drive shafts are arranged in parallel to the longitudinal direction of the operating element. 
     
     
       6. Drive device according to  claim 1 , wherein the drive shafts are mounted in a floating fashion. 
     
     
       7. Drive device according to  claim 1 , characterized in that a helical angle of the teeth of the helical gearing is between 60° and 80°.